Helena and Sarah were able to escape from Coady, but not before Helena's water broke. Still in the Dyad facility, they have to remain elusive from Coady, Westmorland and ...

Sarah, Felix and Kira mourning the death of S coincides with they and the other sisters learning from Sister Irina that Helena has been kidnapped. The sisters' first thou ...

Now that Sarah and Mrs. S have Kira back, they need to get her into a safe place. The activity around their house is remarkably quiet which Sarah believes is not a good s ...

Beyond Mrs. S's dismay in she allowing Rachel's operatives to take Kira back to Dyad, Sarah and Mrs. S have to figure out what their next step is in regard to getting Kir ...

Sarah and Mrs. S., now knowing what Rachel and her associates at Dyad are planning with Kira, are trying whatever they can for Kira not to return to the institute beyond ...

As Mrs. S continues to find out more about Westmorland and Neolutionists with Scott and Hell Wizard doing most of the academic research, Sarah reaches a new agreement wit ...

Sarah is feeling even more detached from Kira, especially after she learns what Kira has done to herself partly as a result of her time with Rachel. Regardless, Mrs. S ha ...

Sarah is trying to adjust to Kira willingly cooperating with Rachel, the adjustment made even more difficult as Kira seems to be shutting her out, not telling her or Mrs. ...

Rachel, having apprehended Sarah, is able to bring her back to the Dyad headquarters. There, Rachel is able to get Sarah in touch with most of those adults in her life th ...

After killing her mother, Rachel is able to abscond with the cure to lead the project. Elsewhere, Ferdinand has kidnapped Mrs. S and Kira, their whereabouts unknown. Sara ...

When communication with Cosima is cut off and Neolution appears to be within striking distance, Sarah's alliance with Rachel goes out the window. Sarah lures a high-level ...

The formal alliance between the sisters on one side Susan/Rachel/Ira on the other side begins in earnest. Cosima has arrived on the island where she and Susan will begin ...

Despite not knowing where she's gone or why she's back, Sarah reconnects with MK, who is able to provide some information as to the fact that the Neolutionists under Evie ...

Sarah regresses to old habits while struggling to cope with the consequences of her decisions - reconnecting with Beth on a dark night of the soul. Back at the lab, Cosim ...

Seeing that it is the best overall solution yet not perfect by any means, Sarah and Cosima decide with Kendall's OK to set up an agreement with Susan Duncan, which they w ...

With Sarah taking a mom day with Kira and Alison busy with a committee meeting, Cosima volunteers to accompany Donnie to the BrightBorn orientation session pretending to ...

Although she doesn't trust him, Sarah knows that Ferdinand now is her strongest lead in getting the bot removed in that he knows the one person who can remove it: Susan D ...

As Sarah reels from the shocking discovery of Neolution's biotech, she's desperate to find answers. Always impulsive, she follows a lead into a harrowing encounter that r ...

After evading Neolution in Iceland, Sarah returns home to track down an elusive new ally. She uncovers the next facet of Neolution's agenda. As Cosima struggles with Delp ...

A flashback into the last several days in Beth's life acts as an extended prologue to the current day goings-on of the sisters. Beth has a source who she has not mentione ...

With Art's help, Sarah, Mrs. S and Felix are able to hide the Castor and Leda original, Mrs. S' own mother Kendall Malone, although she is somewhat of a hostile participa ...

Based on what Rachel had deciphered of Duncan's code, Sarah, Felix and Mrs. S believe the answer to finding the Castor original is in London, where they head to Mrs. S' o ...

The clone club have made the decision that Helena and Gracie should now be the responsibility of the Hendrixes, which does not sit well with Donnie. Both Alison and Donni ...

Sarah and Helena have managed to escape from the Castor compound, and arranging with Mrs. S are awaiting Benjamin's arrival in the Mexican desert to retrieve them. Howeve ...

Sarah is all alone at the Castor compound now that Helena has managed to escape, although Rudy is tasked with locating her, she who they believe cannot get far being in t ...

Mark has captured Sarah and taken her to the Castor compound, where she is housed in a cell adjacent to Helena's. However, it's not quite the reunion that Sarah was hopin ...

Bonnie has shot Mark and has left him for dead. Sarah is able to find and help him, doing so because she knows that the Castor clones are the Leda clones siblings, and th ...

Leda and Castor are both on the hunt for original clone DNA. On-the-lam, Mark and Gracie pursue new leads to find the samples that might set them free, while Art and Sara ...

Castor pursues the Leda clones for original tissue samples. Helena, who is pregnant and imprisoned, is examined by a mysterious new villain. The Castor boys are also out ...

Sarah pursues the missing Helena who is held in a faraway compound. Sarah must use her wiles - and acting chops - to deter a Topside investigator who threatens the Leda s ...

Now that she has Kira and her harvested bone marrow, Rachel is holding all the cards. She replaces Delphine with a Dr. Nealon as the facility and thus Cosima's chief phys ...

As Cosima watches Dr. Duncan re-assemble the missing artificial genetic sequencing, Rachel places Delphine in the executive vacancy created by the sudden demise of Dr. Le ...